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计算(1)8.01+99×8.01(2)125×(8+0.8+0.08+0.008)(3)12+14+18+116+132(4)(0.4+23)÷(56-0.75)×0.5(5)989898×999999÷1

题目详情
计算
(1)8.01+99×8.01
(2)125×(8+0.8+0.08+0.008)
(3)
1
2
+
1
4
+
1
8
+
1
16
+
1
32

(4)(0.4+
2
3
)÷(
5
6
-0.75)×0.5
(5)989898×999999÷10101÷111111.
▼优质解答
答案和解析
(1)8.01+99×8.01,
=(1+99)×8.01,
=100×8.01,
=801;

(2)125×(8+0.8+0.08+0.008),
=125×8+125×0.8+125×0.08+125×0.008,
=1000+100+10+1,
=1111;

(3)
1
2
+
1
4
+
1
8
+
1
16
+
1
32

=1-
1
2
+
1
2
-
1
4
+
1
4
-
1
8
+
1
8
-
1
16
+
1
16
-
1
32

=1-
1
32

=
31
32


(4)(0.4+
2
3
)÷(
5
6
-0.75)×0.5,
=(
2
5
+
2
3
)÷(
5
6
-
3
4
)×0.5,
=
16
15
÷
1
12
×
1
2

=
16
15
×12×
1
2

=
32
5


(5)989898×999999÷10101÷111111,
=(98×10101)×(9×111111)÷10101÷111111,
=(98×10101÷10101)×(9×111111÷111111),
=98×9,
=(100-2)×9,
=900-18,
=882.